function _extends() {
  _extends = Object.assign || function(target) {
    for (let i = 1; i < arguments.length; i++) {
      const source = arguments[ i ]

      for (const key in source) {
        if (Object.prototype.hasOwnProperty.call(source, key)) {
          target[ key ] = source[ key ]
        }
      }
    }

    return target
  }

  return _extends.apply(this, arguments)
}

/* eslint no-console:0 */
const formatRegExp = /%[sdj%]/g

let warning = function warning() {} // don't print warning message when in production env or node runtime

if (typeof process !== 'undefined' && process.env && process.env.NODE_ENV !== 'production' && typeof window !==
	'undefined' && typeof document !== 'undefined') {
  warning = function warning(type, errors) {
    if (typeof console !== 'undefined' && console.warn) {
      if (errors.every(function(e) {
        return typeof e === 'string'
      })) {
        console.warn(type, errors)
      }
    }
  }
}

function convertFieldsError(errors) {
  if (!errors || !errors.length) return null
  const fields = {}

  errors.forEach(function(error) {
    const field = error.field

    fields[ field ] = fields[ field ] || []
    fields[ field ].push(error)
  })
  return fields
}

function format() {
  for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
    args[ _key ] = arguments[ _key ]
  }

  let i = 1

  const f = args[ 0 ]

  const len = args.length

  if (typeof f === 'function') {
    return f.apply(null, args.slice(1))
  }

  if (typeof f === 'string') {
    let str = String(f).replace(formatRegExp, function(x) {
      if (x === '%%') {
        return '%'
      }

      if (i >= len) {
        return x
      }

      switch (x) {
        case '%s':
          return String(args[ i++ ])

        case '%d':
          return Number(args[ i++ ])

        case '%j':
          try {
            return JSON.stringify(args[ i++ ])
          } catch (_) {
            return '[Circular]'
          }

          break

        default:
          return x
      }
    })

    for (let arg = args[ i ]; i < len; arg = args[ ++i ]) {
      str += ' ' + arg
    }

    return str
  }

  return f
}

function isNativeStringType(type) {
  return type === 'string' || type === 'url' || type === 'hex' || type === 'email' || type === 'pattern'
}

function isEmptyValue(value, type) {
  if (value === undefined || value === null) {
    return true
  }

  if (type === 'array' && Array.isArray(value) && !value.length) {
    return true
  }

  if (isNativeStringType(type) && typeof value === 'string' && !value) {
    return true
  }

  return false
}

function asyncParallelArray(arr, func, callback) {
  const results = []

  let total = 0

  const arrLength = arr.length

  function count(errors) {
    results.push.apply(results, errors)
    total++

    if (total === arrLength) {
      callback(results)
    }
  }

  arr.forEach(function(a) {
    func(a, count)
  })
}

function asyncSerialArray(arr, func, callback) {
  let index = 0

  const arrLength = arr.length

  function next(errors) {
    if (errors && errors.length) {
      callback(errors)
      return
    }

    const original = index

    index = index + 1

    if (original < arrLength) {
      func(arr[ original ], next)
    } else {
      callback([])
    }
  }

  next([])
}

function flattenObjArr(objArr) {
  const ret = []

  Object.keys(objArr).forEach(function(k) {
    ret.push.apply(ret, objArr[ k ])
  })
  return ret
}

function asyncMap(objArr, option, func, callback) {
  if (option.first) {
    const _pending = new Promise(function(resolve, reject) {
      const next = function next(errors) {
        callback(errors)
        return errors.length ? reject({
          errors: errors,
          fields: convertFieldsError(errors)
        }) : resolve()
      }

      const flattenArr = flattenObjArr(objArr)

      asyncSerialArray(flattenArr, func, next)
    })

    _pending[ 'catch' ](function(e) {
      return e
    })

    return _pending
  }

  let firstFields = option.firstFields || []

  if (firstFields === true) {
    firstFields = Object.keys(objArr)
  }

  const objArrKeys = Object.keys(objArr)

  const objArrLength = objArrKeys.length

  let total = 0

  const results = []

  const pending = new Promise(function(resolve, reject) {
    const next = function next(errors) {
      results.push.apply(results, errors)
      total++

      if (total === objArrLength) {
        callback(results)
        return results.length ? reject({
          errors: results,
          fields: convertFieldsError(results)
        }) : resolve()
      }
    }

    if (!objArrKeys.length) {
      callback(results)
      resolve()
    }

    objArrKeys.forEach(function(key) {
      const arr = objArr[ key ]

      if (firstFields.indexOf(key) !== -1) {
        asyncSerialArray(arr, func, next)
      } else {
        asyncParallelArray(arr, func, next)
      }
    })
  })

  pending[ 'catch' ](function(e) {
    return e
  })
  return pending
}

function complementError(rule) {
  return function(oe) {
    if (oe && oe.message) {
      oe.field = oe.field || rule.fullField
      return oe
    }

    return {
      message: typeof oe === 'function' ? oe() : oe,
      field: oe.field || rule.fullField
    }
  }
}

function deepMerge(target, source) {
  if (source) {
    for (const s in source) {
      if (source.hasOwnProperty(s)) {
        const value = source[ s ]

        if (typeof value === 'object' && typeof target[ s ] === 'object') {
          target[ s ] = _extends({}, target[ s ], {}, value)
        } else {
          target[ s ] = value
        }
      }
    }
  }

  return target
}

/**
 *  Rule for validating required fields.
 *
 *  @param rule The validation rule.
 *  @param value The value of the field on the source object.
 *  @param source The source object being validated.
 *  @param errors An array of errors that this rule may add
 *  validation errors to.
 *  @param options The validation options.
 *  @param options.messages The validation messages.
 */

function required(rule, value, source, errors, options, type) {
  if (rule.required && (!source.hasOwnProperty(rule.field) || isEmptyValue(value, type || rule.type))) {
    errors.push(format(options.messages.required, rule.fullField))
  }
}

/**
 *  Rule for validating whitespace.
 *
 *  @param rule The validation rule.
 *  @param value The value of the field on the source object.
 *  @param source The source object being validated.
 *  @param errors An array of errors that this rule may add
 *  validation errors to.
 *  @param options The validation options.
 *  @param options.messages The validation messages.
 */

function whitespace(rule, value, source, errors, options) {
  if (/^\s+$/.test(value) || value === '') {
    errors.push(format(options.messages.whitespace, rule.fullField))
  }
}

/* eslint max-len:0 */

const pattern = {
  // http://emailregex.com/
  email: /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/,
  url: new RegExp(
    '^(?!mailto:)(?:(?:http|https|ftp)://|//)(?:\\S+(?::\\S*)?@)?(?:(?:(?:[1-9]\\d?|1\\d\\d|2[01]\\d|22[0-3])(?:\\.(?:1?\\d{1,2}|2[0-4]\\d|25[0-5])){2}(?:\\.(?:[0-9]\\d?|1\\d\\d|2[0-4]\\d|25[0-4]))|(?:(?:[a-z\\u00a1-\\uffff0-9]+-*)*[a-z\\u00a1-\\uffff0-9]+)(?:\\.(?:[a-z\\u00a1-\\uffff0-9]+-*)*[a-z\\u00a1-\\uffff0-9]+)*(?:\\.(?:[a-z\\u00a1-\\uffff]{2,})))|localhost)(?::\\d{2,5})?(?:(/|\\?|#)[^\\s]*)?$',
    'i'
  ),
  hex: /^#?([a-f0-9]{6}|[a-f0-9]{3})$/i
}
var types = {
  integer: function integer(value) {
    return types.number(value) && parseInt(value, 10) === value
  },
  'float': function float(value) {
    return types.number(value) && !types.integer(value)
  },
  array: function array(value) {
    return Array.isArray(value)
  },
  regexp: function regexp(value) {
    if (value instanceof RegExp) {
      return true
    }

    try {
      return !!new RegExp(value)
    } catch (e) {
      return false
    }
  },
  date: function date(value) {
    return typeof value.getTime === 'function' && typeof value.getMonth === 'function' && typeof value.getYear ===
			'function'
  },
  number: function number(value) {
    if (isNaN(value)) {
      return false
    }

    // 修改源码，将字符串数值先转为数值
    return typeof +value === 'number'
  },
  object: function object(value) {
    return typeof value === 'object' && !types.array(value)
  },
  method: function method(value) {
    return typeof value === 'function'
  },
  email: function email(value) {
    return typeof value === 'string' && !!value.match(pattern.email) && value.length < 255
  },
  url: function url(value) {
    return typeof value === 'string' && !!value.match(pattern.url)
  },
  hex: function hex(value) {
    return typeof value === 'string' && !!value.match(pattern.hex)
  }
}
/**
 *  Rule for validating the type of a value.
 *
 *  @param rule The validation rule.
 *  @param value The value of the field on the source object.
 *  @param source The source object being validated.
 *  @param errors An array of errors that this rule may add
 *  validation errors to.
 *  @param options The validation options.
 *  @param options.messages The validation messages.
 */

function type(rule, value, source, errors, options) {
  if (rule.required && value === undefined) {
    required(rule, value, source, errors, options)
    return
  }

  const custom = ['integer', 'float', 'array', 'regexp', 'object', 'method', 'email', 'number', 'date', 'url', 'hex']

  const ruleType = rule.type

  if (custom.indexOf(ruleType) > -1) {
    if (!types[ ruleType ](value)) {
      errors.push(format(options.messages.types[ ruleType ], rule.fullField, rule.type))
    } // straight typeof check

  } else if (ruleType && typeof value !== rule.type) {
    errors.push(format(options.messages.types[ ruleType ], rule.fullField, rule.type))
  }
}

/**
 *  Rule for validating minimum and maximum allowed values.
 *
 *  @param rule The validation rule.
 *  @param value The value of the field on the source object.
 *  @param source The source object being validated.
 *  @param errors An array of errors that this rule may add
 *  validation errors to.
 *  @param options The validation options.
 *  @param options.messages The validation messages.
 */

function range(rule, value, source, errors, options) {
  const len = typeof rule.len === 'number'

  const min = typeof rule.min === 'number'

  const max = typeof rule.max === 'number' // 正则匹配码点范围从U+010000一直到U+10FFFF的文字（补充平面Supplementary Plane）

  const spRegexp = /[\uD800-\uDBFF][\uDC00-\uDFFF]/g

  let val = value

  let key = null

  const num = typeof value === 'number'

  const str = typeof value === 'string'

  const arr = Array.isArray(value)

  if (num) {
    key = 'number'
  } else if (str) {
    key = 'string'
  } else if (arr) {
    key = 'array'
  } // if the value is not of a supported type for range validation
  // the validation rule rule should use the
  // type property to also test for a particular type

  if (!key) {
    return false
  }

  if (arr) {
    val = value.length
  }

  if (str) {
    // 处理码点大于U+010000的文字length属性不准确的bug，如"𠮷𠮷𠮷".lenght !== 3
    val = value.replace(spRegexp, '_').length
  }

  if (len) {
    if (val !== rule.len) {
      errors.push(format(options.messages[ key ].len, rule.fullField, rule.len))
    }
  } else if (min && !max && val < rule.min) {
    errors.push(format(options.messages[ key ].min, rule.fullField, rule.min))
  } else if (max && !min && val > rule.max) {
    errors.push(format(options.messages[ key ].max, rule.fullField, rule.max))
  } else if (min && max && (val < rule.min || val > rule.max)) {
    errors.push(format(options.messages[ key ].range, rule.fullField, rule.min, rule.max))
  }
}

const ENUM = 'enum'
/**
 *  Rule for validating a value exists in an enumerable list.
 *
 *  @param rule The validation rule.
 *  @param value The value of the field on the source object.
 *  @param source The source object being validated.
 *  @param errors An array of errors that this rule may add
 *  validation errors to.
 *  @param options The validation options.
 *  @param options.messages The validation messages.
 */

function enumerable(rule, value, source, errors, options) {
  rule[ ENUM ] = Array.isArray(rule[ ENUM ]) ? rule[ ENUM ] : []

  if (rule[ ENUM ].indexOf(value) === -1) {
    errors.push(format(options.messages[ ENUM ], rule.fullField, rule[ ENUM ].join(', ')))
  }
}

/**
 *  Rule for validating a regular expression pattern.
 *
 *  @param rule The validation rule.
 *  @param value The value of the field on the source object.
 *  @param source The source object being validated.
 *  @param errors An array of errors that this rule may add
 *  validation errors to.
 *  @param options The validation options.
 *  @param options.messages The validation messages.
 */

function pattern$1(rule, value, source, errors, options) {
  if (rule.pattern) {
    if (rule.pattern instanceof RegExp) {
      // if a RegExp instance is passed, reset `lastIndex` in case its `global`
      // flag is accidentally set to `true`, which in a validation scenario
      // is not necessary and the result might be misleading
      rule.pattern.lastIndex = 0

      if (!rule.pattern.test(value)) {
        errors.push(format(options.messages.pattern.mismatch, rule.fullField, value, rule.pattern))
      }
    } else if (typeof rule.pattern === 'string') {
      const _pattern = new RegExp(rule.pattern)

      if (!_pattern.test(value)) {
        errors.push(format(options.messages.pattern.mismatch, rule.fullField, value, rule.pattern))
      }
    }
  }
}

const rules = {
  required: required,
  whitespace: whitespace,
  type: type,
  range: range,
  'enum': enumerable,
  pattern: pattern$1
}

/**
 *  Performs validation for string types.
 *
 *  @param rule The validation rule.
 *  @param value The value of the field on the source object.
 *  @param callback The callback function.
 *  @param source The source object being validated.
 *  @param options The validation options.
 *  @param options.messages The validation messages.
 */

function string(rule, value, callback, source, options) {
  const errors = []

  const validate = rule.required || !rule.required && source.hasOwnProperty(rule.field)

  if (validate) {
    if (isEmptyValue(value, 'string') && !rule.required) {
      return callback()
    }

    rules.required(rule, value, source, errors, options, 'string')

    if (!isEmptyValue(value, 'string')) {
      rules.type(rule, value, source, errors, options)
      rules.range(rule, value, source, errors, options)
      rules.pattern(rule, value, source, errors, options)

      if (rule.whitespace === true) {
        rules.whitespace(rule, value, source, errors, options)
      }
    }
  }

  callback(errors)
}

/**
 *  Validates a function.
 *
 *  @param rule The validation rule.
 *  @param value The value of the field on the source object.
 *  @param callback The callback function.
 *  @param source The source object being validated.
 *  @param options The validation options.
 *  @param options.messages The validation messages.
 */

function method(rule, value, callback, source, options) {
  const errors = []

  const validate = rule.required || !rule.required && source.hasOwnProperty(rule.field)

  if (validate) {
    if (isEmptyValue(value) && !rule.required) {
      return callback()
    }

    rules.required(rule, value, source, errors, options)

    if (value !== undefined) {
      rules.type(rule, value, source, errors, options)
    }
  }

  callback(errors)
}

/**
 *  Validates a number.
 *
 *  @param rule The validation rule.
 *  @param value The value of the field on the source object.
 *  @param callback The callback function.
 *  @param source The source object being validated.
 *  @param options The validation options.
 *  @param options.messages The validation messages.
 */

function number(rule, value, callback, source, options) {
  const errors = []

  const validate = rule.required || !rule.required && source.hasOwnProperty(rule.field)

  if (validate) {
    if (value === '') {
      value = undefined
    }

    if (isEmptyValue(value) && !rule.required) {
      return callback()
    }

    rules.required(rule, value, source, errors, options)

    if (value !== undefined) {
      rules.type(rule, value, source, errors, options)
      rules.range(rule, value, source, errors, options)
    }
  }

  callback(errors)
}

/**
 *  Validates a boolean.
 *
 *  @param rule The validation rule.
 *  @param value The value of the field on the source object.
 *  @param callback The callback function.
 *  @param source The source object being validated.
 *  @param options The validation options.
 *  @param options.messages The validation messages.
 */

function _boolean(rule, value, callback, source, options) {
  const errors = []

  const validate = rule.required || !rule.required && source.hasOwnProperty(rule.field)

  if (validate) {
    if (isEmptyValue(value) && !rule.required) {
      return callback()
    }

    rules.required(rule, value, source, errors, options)

    if (value !== undefined) {
      rules.type(rule, value, source, errors, options)
    }
  }

  callback(errors)
}

/**
 *  Validates the regular expression type.
 *
 *  @param rule The validation rule.
 *  @param value The value of the field on the source object.
 *  @param callback The callback function.
 *  @param source The source object being validated.
 *  @param options The validation options.
 *  @param options.messages The validation messages.
 */

function regexp(rule, value, callback, source, options) {
  const errors = []

  const validate = rule.required || !rule.required && source.hasOwnProperty(rule.field)

  if (validate) {
    if (isEmptyValue(value) && !rule.required) {
      return callback()
    }

    rules.required(rule, value, source, errors, options)

    if (!isEmptyValue(value)) {
      rules.type(rule, value, source, errors, options)
    }
  }

  callback(errors)
}

/**
 *  Validates a number is an integer.
 *
 *  @param rule The validation rule.
 *  @param value The value of the field on the source object.
 *  @param callback The callback function.
 *  @param source The source object being validated.
 *  @param options The validation options.
 *  @param options.messages The validation messages.
 */

function integer(rule, value, callback, source, options) {
  const errors = []

  const validate = rule.required || !rule.required && source.hasOwnProperty(rule.field)

  if (validate) {
    if (isEmptyValue(value) && !rule.required) {
      return callback()
    }

    rules.required(rule, value, source, errors, options)

    if (value !== undefined) {
      rules.type(rule, value, source, errors, options)
      rules.range(rule, value, source, errors, options)
    }
  }

  callback(errors)
}

/**
 *  Validates a number is a floating point number.
 *
 *  @param rule The validation rule.
 *  @param value The value of the field on the source object.
 *  @param callback The callback function.
 *  @param source The source object being validated.
 *  @param options The validation options.
 *  @param options.messages The validation messages.
 */

function floatFn(rule, value, callback, source, options) {
  const errors = []

  const validate = rule.required || !rule.required && source.hasOwnProperty(rule.field)

  if (validate) {
    if (isEmptyValue(value) && !rule.required) {
      return callback()
    }

    rules.required(rule, value, source, errors, options)

    if (value !== undefined) {
      rules.type(rule, value, source, errors, options)
      rules.range(rule, value, source, errors, options)
    }
  }

  callback(errors)
}

/**
 *  Validates an array.
 *
 *  @param rule The validation rule.
 *  @param value The value of the field on the source object.
 *  @param callback The callback function.
 *  @param source The source object being validated.
 *  @param options The validation options.
 *  @param options.messages The validation messages.
 */

function array(rule, value, callback, source, options) {
  const errors = []

  const validate = rule.required || !rule.required && source.hasOwnProperty(rule.field)

  if (validate) {
    if (isEmptyValue(value, 'array') && !rule.required) {
      return callback()
    }

    rules.required(rule, value, source, errors, options, 'array')

    if (!isEmptyValue(value, 'array')) {
      rules.type(rule, value, source, errors, options)
      rules.range(rule, value, source, errors, options)
    }
  }

  callback(errors)
}

/**
 *  Validates an object.
 *
 *  @param rule The validation rule.
 *  @param value The value of the field on the source object.
 *  @param callback The callback function.
 *  @param source The source object being validated.
 *  @param options The validation options.
 *  @param options.messages The validation messages.
 */

function object(rule, value, callback, source, options) {
  const errors = []

  const validate = rule.required || !rule.required && source.hasOwnProperty(rule.field)

  if (validate) {
    if (isEmptyValue(value) && !rule.required) {
      return callback()
    }

    rules.required(rule, value, source, errors, options)

    if (value !== undefined) {
      rules.type(rule, value, source, errors, options)
    }
  }

  callback(errors)
}

const ENUM$1 = 'enum'
/**
 *  Validates an enumerable list.
 *
 *  @param rule The validation rule.
 *  @param value The value of the field on the source object.
 *  @param callback The callback function.
 *  @param source The source object being validated.
 *  @param options The validation options.
 *  @param options.messages The validation messages.
 */

function enumerable$1(rule, value, callback, source, options) {
  const errors = []

  const validate = rule.required || !rule.required && source.hasOwnProperty(rule.field)

  if (validate) {
    if (isEmptyValue(value) && !rule.required) {
      return callback()
    }

    rules.required(rule, value, source, errors, options)

    if (value !== undefined) {
      rules[ ENUM$1 ](rule, value, source, errors, options)
    }
  }

  callback(errors)
}

/**
 *  Validates a regular expression pattern.
 *
 *  Performs validation when a rule only contains
 *  a pattern property but is not declared as a string type.
 *
 *  @param rule The validation rule.
 *  @param value The value of the field on the source object.
 *  @param callback The callback function.
 *  @param source The source object being validated.
 *  @param options The validation options.
 *  @param options.messages The validation messages.
 */

function pattern$2(rule, value, callback, source, options) {
  const errors = []

  const validate = rule.required || !rule.required && source.hasOwnProperty(rule.field)

  if (validate) {
    if (isEmptyValue(value, 'string') && !rule.required) {
      return callback()
    }

    rules.required(rule, value, source, errors, options)

    if (!isEmptyValue(value, 'string')) {
      rules.pattern(rule, value, source, errors, options)
    }
  }

  callback(errors)
}

function date(rule, value, callback, source, options) {
  const errors = []

  const validate = rule.required || !rule.required && source.hasOwnProperty(rule.field)

  if (validate) {
    if (isEmptyValue(value) && !rule.required) {
      return callback()
    }

    rules.required(rule, value, source, errors, options)

    if (!isEmptyValue(value)) {
      let dateObject

      if (typeof value === 'number') {
        dateObject = new Date(value)
      } else {
        dateObject = value
      }

      rules.type(rule, dateObject, source, errors, options)

      if (dateObject) {
        rules.range(rule, dateObject.getTime(), source, errors, options)
      }
    }
  }

  callback(errors)
}

function required$1(rule, value, callback, source, options) {
  const errors = []

  const type = Array.isArray(value) ? 'array' : typeof value

  rules.required(rule, value, source, errors, options, type)
  callback(errors)
}

function type$1(rule, value, callback, source, options) {
  const ruleType = rule.type

  const errors = []

  const validate = rule.required || !rule.required && source.hasOwnProperty(rule.field)

  if (validate) {
    if (isEmptyValue(value, ruleType) && !rule.required) {
      return callback()
    }

    rules.required(rule, value, source, errors, options, ruleType)

    if (!isEmptyValue(value, ruleType)) {
      rules.type(rule, value, source, errors, options)
    }
  }

  callback(errors)
}

/**
 *  Performs validation for any type.
 *
 *  @param rule The validation rule.
 *  @param value The value of the field on the source object.
 *  @param callback The callback function.
 *  @param source The source object being validated.
 *  @param options The validation options.
 *  @param options.messages The validation messages.
 */

function any(rule, value, callback, source, options) {
  const errors = []

  const validate = rule.required || !rule.required && source.hasOwnProperty(rule.field)

  if (validate) {
    if (isEmptyValue(value) && !rule.required) {
      return callback()
    }

    rules.required(rule, value, source, errors, options)
  }

  callback(errors)
}

const validators = {
  string: string,
  method: method,
  number: number,
  'boolean': _boolean,
  regexp: regexp,
  integer: integer,
  'float': floatFn,
  array: array,
  object: object,
  'enum': enumerable$1,
  pattern: pattern$2,
  date: date,
  url: type$1,
  hex: type$1,
  email: type$1,
  required: required$1,
  any: any
}

function newMessages() {
  return {
    'default': 'Validation error on field %s',
    required: '%s is required',
    'enum': '%s must be one of %s',
    whitespace: '%s cannot be empty',
    date: {
      format: '%s date %s is invalid for format %s',
      parse: '%s date could not be parsed, %s is invalid ',
      invalid: '%s date %s is invalid'
    },
    types: {
      string: '%s is not a %s',
      method: '%s is not a %s (function)',
      array: '%s is not an %s',
      object: '%s is not an %s',
      number: '%s is not a %s',
      date: '%s is not a %s',
      'boolean': '%s is not a %s',
      integer: '%s is not an %s',
      'float': '%s is not a %s',
      regexp: '%s is not a valid %s',
      email: '%s is not a valid %s',
      url: '%s is not a valid %s',
      hex: '%s is not a valid %s'
    },
    string: {
      len: '%s must be exactly %s characters',
      min: '%s must be at least %s characters',
      max: '%s cannot be longer than %s characters',
      range: '%s must be between %s and %s characters'
    },
    number: {
      len: '%s must equal %s',
      min: '%s cannot be less than %s',
      max: '%s cannot be greater than %s',
      range: '%s must be between %s and %s'
    },
    array: {
      len: '%s must be exactly %s in length',
      min: '%s cannot be less than %s in length',
      max: '%s cannot be greater than %s in length',
      range: '%s must be between %s and %s in length'
    },
    pattern: {
      mismatch: '%s value %s does not match pattern %s'
    },
    clone: function clone() {
      const cloned = JSON.parse(JSON.stringify(this))

      cloned.clone = this.clone
      return cloned
    }
  }
}
const messages = newMessages()

/**
 *  Encapsulates a validation schema.
 *
 *  @param descriptor An object declaring validation rules
 *  for this schema.
 */

function Schema(descriptor) {
  this.rules = null
  this._messages = messages
  this.define(descriptor)
}

Schema.prototype = {
  messages: function messages(_messages) {
    if (_messages) {
      this._messages = deepMerge(newMessages(), _messages)
    }

    return this._messages
  },
  define: function define(rules) {
    if (!rules) {
      throw new Error('Cannot configure a schema with no rules')
    }

    if (typeof rules !== 'object' || Array.isArray(rules)) {
      throw new Error('Rules must be an object')
    }

    this.rules = {}
    let z

    let item

    for (z in rules) {
      if (rules.hasOwnProperty(z)) {
        item = rules[ z ]
        this.rules[ z ] = Array.isArray(item) ? item : [item]
      }
    }
  },
  validate: function validate(source_, o, oc) {
    const _this = this

    if (o === void 0) {
      o = {}
    }

    if (oc === void 0) {
      oc = function oc() {}
    }

    let source = source_

    let options = o

    let callback = oc

    if (typeof options === 'function') {
      callback = options
      options = {}
    }

    if (!this.rules || Object.keys(this.rules).length === 0) {
      if (callback) {
        callback()
      }

      return Promise.resolve()
    }

    function complete(results) {
      let i

      let errors = []

      let fields = {}

      function add(e) {
        if (Array.isArray(e)) {
          let _errors

          errors = (_errors = errors).concat.apply(_errors, e)
        } else {
          errors.push(e)
        }
      }

      for (i = 0; i < results.length; i++) {
        add(results[ i ])
      }

      if (!errors.length) {
        errors = null
        fields = null
      } else {
        fields = convertFieldsError(errors)
      }

      callback(errors, fields)
    }

    if (options.messages) {
      let messages$1 = this.messages()

      if (messages$1 === messages) {
        messages$1 = newMessages()
      }

      deepMerge(messages$1, options.messages)
      options.messages = messages$1
    } else {
      options.messages = this.messages()
    }

    let arr

    let value

    const series = {}

    const keys = options.keys || Object.keys(this.rules)

    keys.forEach(function(z) {
      arr = _this.rules[ z ]
      value = source[ z ]
      arr.forEach(function(r) {
        let rule = r

        if (typeof rule.transform === 'function') {
          if (source === source_) {
            source = _extends({}, source)
          }

          value = source[ z ] = rule.transform(value)
        }

        if (typeof rule === 'function') {
          rule = {
            validator: rule
          }
        } else {
          rule = _extends({}, rule)
        }

        rule.validator = _this.getValidationMethod(rule)
        rule.field = z
        rule.fullField = rule.fullField || z
        rule.type = _this.getType(rule)

        if (!rule.validator) {
          return
        }

        series[ z ] = series[ z ] || []
        series[ z ].push({
          rule: rule,
          value: value,
          source: source,
          field: z
        })
      })
    })
    const errorFields = {}

    return asyncMap(series, options, function(data, doIt) {
      const rule = data.rule

      let deep = (rule.type === 'object' || rule.type === 'array') && (typeof rule.fields === 'object' || typeof rule.defaultField ===
				'object')

      deep = deep && (rule.required || !rule.required && data.value)
      rule.field = data.field

      function addFullfield(key, schema) {
        return _extends({}, schema, {
          fullField: rule.fullField + '.' + key
        })
      }

      function cb(e) {
        if (e === void 0) {
          e = []
        }

        let errors = e

        if (!Array.isArray(errors)) {
          errors = [errors]
        }

        if (!options.suppressWarning && errors.length) {
          Schema.warning('async-validator:', errors)
        }

        if (errors.length && rule.message) {
          errors = [].concat(rule.message)
        }

        errors = errors.map(complementError(rule))

        if (options.first && errors.length) {
          errorFields[ rule.field ] = 1
          return doIt(errors)
        }

        if (!deep) {
          doIt(errors)
        } else {
          // if rule is required but the target object
          // does not exist fail at the rule level and don't
          // go deeper
          if (rule.required && !data.value) {
            if (rule.message) {
              errors = [].concat(rule.message).map(complementError(rule))
            } else if (options.error) {
              errors = [options.error(rule, format(options.messages.required, rule.field))]
            } else {
              errors = []
            }

            return doIt(errors)
          }

          let fieldsSchema = {}

          if (rule.defaultField) {
            for (const k in data.value) {
              if (data.value.hasOwnProperty(k)) {
                fieldsSchema[ k ] = rule.defaultField
              }
            }
          }

          fieldsSchema = _extends({}, fieldsSchema, {}, data.rule.fields)

          for (const f in fieldsSchema) {
            if (fieldsSchema.hasOwnProperty(f)) {
              const fieldSchema = Array.isArray(fieldsSchema[ f ]) ? fieldsSchema[ f ] : [fieldsSchema[ f ]]

              fieldsSchema[ f ] = fieldSchema.map(addFullfield.bind(null, f))
            }
          }

          const schema = new Schema(fieldsSchema)

          schema.messages(options.messages)

          if (data.rule.options) {
            data.rule.options.messages = options.messages
            data.rule.options.error = options.error
          }

          schema.validate(data.value, data.rule.options || options, function(errs) {
            const finalErrors = []

            if (errors && errors.length) {
              finalErrors.push.apply(finalErrors, errors)
            }

            if (errs && errs.length) {
              finalErrors.push.apply(finalErrors, errs)
            }

            doIt(finalErrors.length ? finalErrors : null)
          })
        }
      }

      let res

      if (rule.asyncValidator) {
        res = rule.asyncValidator(rule, data.value, cb, data.source, options)
      } else if (rule.validator) {
        res = rule.validator(rule, data.value, cb, data.source, options)

        if (res === true) {
          cb()
        } else if (res === false) {
          cb(rule.message || rule.field + ' fails')
        } else if (res instanceof Array) {
          cb(res)
        } else if (res instanceof Error) {
          cb(res.message)
        }
      }

      if (res && res.then) {
        res.then(function() {
          return cb()
        }, function(e) {
          return cb(e)
        })
      }
    }, function(results) {
      complete(results)
    })
  },
  getType: function getType(rule) {
    if (rule.type === undefined && rule.pattern instanceof RegExp) {
      rule.type = 'pattern'
    }

    if (typeof rule.validator !== 'function' && rule.type && !validators.hasOwnProperty(rule.type)) {
      throw new Error(format('Unknown rule type %s', rule.type))
    }

    return rule.type || 'string'
  },
  getValidationMethod: function getValidationMethod(rule) {
    if (typeof rule.validator === 'function') {
      return rule.validator
    }

    const keys = Object.keys(rule)

    const messageIndex = keys.indexOf('message')

    if (messageIndex !== -1) {
      keys.splice(messageIndex, 1)
    }

    if (keys.length === 1 && keys[ 0 ] === 'required') {
      return validators.required
    }

    return validators[ this.getType(rule) ] || false
  }
}

Schema.register = function register(type, validator) {
  if (typeof validator !== 'function') {
    throw new Error('Cannot register a validator by type, validator is not a function')
  }

  validators[ type ] = validator
}

Schema.warning = warning
Schema.messages = messages

export default Schema
// # sourceMappingURL=index.js.map
